WO2019128727A1 - High-temperature integrated denitration and dust removing apparatus - Google Patents

High-temperature integrated denitration and dust removing apparatus Download PDF

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Publication number
WO2019128727A1
WO2019128727A1 PCT/CN2018/120890 CN2018120890W WO2019128727A1 WO 2019128727 A1 WO2019128727 A1 WO 2019128727A1 CN 2018120890 W CN2018120890 W CN 2018120890W WO 2019128727 A1 WO2019128727 A1 WO 2019128727A1
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dust removal
denitration
integrated device
flue
temperature denitration
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PCT/CN2018/120890
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French (fr)
Chinese (zh)
Inventor
聂华
吴其荣
喻江涛
刘宇
吉庆
范振兴
黎方潜
周川
王进
周川雄
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国家电投集团远达环保工程有限公司重庆科技分公司
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Publication of WO2019128727A1 publication Critical patent/WO2019128727A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/18—Cleaning-out devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/56—Nitrogen oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8631—Processes characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/90—Injecting reactants

Definitions

  • the invention relates to the field of flue gas purification, and more particularly to an integrated equipment for high temperature denitration and dust removal.
  • the present invention provides an integrated equipment for high temperature denitration and dust removal.
  • the present invention adopts the following technical solutions:
  • a body comprising at least one body unit, the body unit being a V-shaped plate-like structure, the body being disposed in a flue or a reactor to denitrate and dedust the flue gas flowing through;
  • a ash hopper is disposed outside the flue or reactor and below the body to collect dust removed by the body.
  • the body is composed of a plurality of body units side by side, and the body unit includes:
  • a bending member comprising two solid rectangular plates closely connected to each other at corresponding edges, the bent portion having a substantially V-shaped cross section;
  • the bending member is made of FRP, carbon steel or stainless steel.
  • the composite member has a porous structure, and the compression loss coefficient of the bending member is greater than the pressure loss coefficient of the composite member.
  • the composite member includes:
  • a second ply having a porous structure and made of a ceramic material or other wear resistant material, the second ply being attached to the first ply.
  • the first ply is formed of a catalyst material having denitration.
  • the second layer is made of one or more of corundum, mullite, cordierite, aluminum silicate fiber, and silicon carbide.
  • the high-temperature denitration and dust removal integrated device further includes: a reverse purge system disposed on a side of the flue or reactor facing the first ply.
  • an angle between two rectangular plates of each of the bending members is 15° or more and less than 180°.
  • the body is formed in one or more layers in the flow direction of the flue gas of the flue.
  • the number of said bodies per layer is set according to the size of the flue or reactor, and generally includes four or more said unit units which are connected to each other and juxtaposed.
  • the ash hopper is formed in a tapered shape.
  • the V-shaped plate-shaped body is disposed in the flue or the reactor to remove the dust in the flue or the reactor, and the dust is collected under the body.
  • the ash bucket reduces the running cost by optimizing and improving the existing device.
  • the high-temperature off-load and dust-removing integrated device has small pressure loss and small influence on the flow of the flue gas, and can effectively remove nitrogen in the fly ash and the flue gas at high temperature. Oxide, which can reduce the wear and clogging of the fly ash in the SCR system on the catalyst and subsequent equipment, and improve the overall denitration and dust removal efficiency of the SCR denitration system.
  • FIG. 1 is a schematic structural view of an integrated equipment for high-temperature denitration and dust removal according to an embodiment of the present invention
  • FIG. 2 is a schematic structural view of a body of an integrated equipment for high-temperature denitration and dust removal according to an embodiment of the present invention.
  • the high-temperature denitration and dust removal integrated device 100 according to an embodiment of the present invention will be specifically described below with reference to the accompanying drawings.
  • a high temperature denitration and dust removal integrated apparatus 100 includes a body 10 and a hopper 20.
  • the body 10 includes at least one body unit, the body unit is a V-shaped plate-like structure, and the body 10 is disposed in a flue or a reactor to denitrify and remove dust flowing through the flue gas, and the ash hopper 20 is disposed in the flue. Or outside the reactor and below the body 10 to collect the dust removed by the body 10.
  • the high-temperature denitration and dust removal integrated device 100 is mainly composed of a body 10 and a hopper 20, wherein the body 10 includes at least one body unit, the body unit is a V-shaped plate, and the body 10 is disposed in a passage through which the smoke flows.
  • the body 10 can be arranged in the flue or the reactor, the flow velocity of the flue gas in the passage is ⁇ 15 m/s, and the ash bucket 20 is provided below the body 10 and outside the flue or the reactor, and the hopper 20 is used. The dust removed from the body 10 is collected.
  • the high-temperature denitration and dust removal integrated apparatus 100 removes the dust in the flue or the reactor by disposing the V-shaped plate-shaped body 10 in the flue or the reactor, and is in the body 10
  • the ash bucket 20 for collecting dust is provided below, and the operation cost is reduced by optimizing and improving the existing device.
  • the high-temperature off-load dust-removing integrated device 100 has small pressure loss, has little influence on the flow of the flue gas, and can effectively take off at a high temperature. In addition to fly ash, improve the efficiency of the SCR system.
  • the body 10 is composed of a plurality of body units 11 side by side, and the body unit 11 includes a bending member 12 and two composite members 13.
  • the bending member 12 includes two solid rectangular plates that are closely connected to each other at the corresponding edges, and the cross-section of the bending member 12 is substantially V-shaped, that is, an angle is formed between the two rectangular plates.
  • This structure is very simple.
  • Each of the composite members 13 is formed substantially as a perforated rectangular plate, and each composite member 13 is in a plane in which a corresponding rectangular plate of the bent member 12 is located from an edge opposite to the edge to be tightly joined, away from the edge of the tight connection. extend.
  • each composite member 13 and a corresponding one of the rectangular members 12 are substantially coplanar.
  • the composite member 13 is used for denitration and dust removal of the flue gas, and the number of the unit units 11 is set to be related to the width of the flue or the reactor.
  • the bending member 12 is made of FRP, carbon steel or stainless steel, and the bending member may be a flat layer made of these materials.
  • the composite member 13 is of a porous structure, and the pressure loss coefficient of the bending member 12 is greater than the pressure loss coefficient of the composite member 13.
  • the composite member 13 is a composite structure and includes a first ply 14 and a second ply 15.
  • the first ply 14 has a porous channel structure and is made of a catalyst for performing a denitration reaction.
  • the porous channel structure is a porous structure having a plurality of channels.
  • the second ply 15 has a porous structure and is made of a ceramic material, and the second ply 15 is attached to the first ply 14 .
  • the second ply 15 is made of one or more of corundum, mullite, cordierite, aluminum silicate fiber, and silicon carbide.
  • the first ply 14 is formed of a Vi 2 O 5 —TiO 2 /WO 3 material and subjected to denitration reaction with nitrogen oxides in the flue gas to achieve a denitration function.
  • the porous ceramic structure of the second layer 15 is used for removing fly ash in the flue gas, thereby achieving the purpose of simultaneous denitration and dust removal of high temperature flue gas, reducing clogging and wear of the catalyst and subsequent equipment in the SCR system, and improving The overall denitration efficiency of the SCR system.
  • the high-temperature denitration and dust removal integrated device 100 further includes a reverse purge system, the reverse purge system is disposed in the flue or reactor and faces the first layer 14 side, and the back purge system can be steam or sonic purge
  • the system, backflush system is determined based on the ash content of the flue or reactor and its structure.
  • the angle between the two rectangular plates of each bend member 12 is greater than 15° and less than 180°.
  • one or more of the bodies 10 may be arranged in the direction of flow of the flue gas in the flue, depending on the process requirements.
  • each of the layers 10 generally includes four body units 11 interconnected and juxtaposed, the number of which is determined by the width of the flue or reactor.
  • the ash bucket 20 is formed in a tapered shape.
  • the high-temperature denitration and dust removal integrated device 100 removes dust in a flue or reactor by disposing the body 10 having a V-shaped plate-shaped body unit in a flue or a reactor.
  • a dust hopper 20 for collecting dust is disposed under the body 10, and the operating cost is reduced by optimizing and improving the existing device.
  • the high-temperature off-load and dust-removing integrated device 100 has small pressure loss, small influence on the flow of the flue gas, and can be at a high temperature. Effectively remove nitrogen oxides from fly ash and flue gas, which can reduce the wear and blockage of fly ash in the SCR system on the catalyst and subsequent equipment, and improve the overall denitration efficiency of the SCR denitration system.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

A high-temperature integrated denitration and dust removing apparatus (100), comprising: a body (10), which comprises at least a body unit (11), the body unit (11) being a V-shaped plate-like structure, and the body (10) being provided in a flue or a reactor to perform denitration and dust removing on flue gas flowing through; and an ash hopper (20), which is provided outside the flue or the reactor and below the body (10) for collecting dust removed by the body (10).

Description

一种高温脱硝除尘一体化装备High-temperature denitration and dust removal integrated equipment 技术领域Technical field
本发明涉及烟气净化领域，更具体地，涉及一种高温脱硝除尘一体化装备。The invention relates to the field of flue gas purification, and more particularly to an integrated equipment for high temperature denitration and dust removal.
背景技术Background technique
随着国家针对燃煤超低排放政策的提出，现有技术中的脱硫和除尘技术已很难满足超低排放要求下的严格排放指标。With the country's proposal for ultra-low emission of coal, the desulfurization and dedusting technologies in the prior art have been difficult to meet the strict emission targets under ultra-low emission requirements.
现有技术中采用SCR选择性催化还原技术的烟气脱硝系统中，主要基于惯性和重力沉积进行高温除尘，但此类高温除尘装置，没有在除尘的同时具有脱硝的作用，除尘效率低下，增大了烟道阻力，影响烟气流动的稳定性，增加脱硝系统运行的成本。在实际使用过程中由于过高的烟气流速，除尘效果有限。因此，目前急需开发一种结构简单、压损小、除尘效率高，并且能够同时脱硝的高温除尘脱硝一体化装备。In the flue gas denitration system adopting SCR selective catalytic reduction technology in the prior art, high-temperature dust removal is mainly performed based on inertia and gravity deposition, but such high-temperature dust removal device does not have denitration effect at the same time of dust removal, and the dust removal efficiency is low, increasing Large flue resistance, affecting the stability of flue gas flow, and increasing the cost of denitration system operation. In actual use, due to the excessive flow rate of flue gas, the dust removal effect is limited. Therefore, there is an urgent need to develop a high-temperature dust removal and denitration integrated equipment with simple structure, small pressure loss, high dust removal efficiency, and simultaneous denitration.
发明内容Summary of the invention
有鉴于此，本发明提供一种高温脱硝除尘一体化装备。In view of this, the present invention provides an integrated equipment for high temperature denitration and dust removal.
为解决上述技术问题，本发明采用以下技术方案：In order to solve the above technical problems, the present invention adopts the following technical solutions:
根据本发明实施例的高温脱硝除尘一体化装备包括：The high-temperature denitration and dust removal integrated equipment according to an embodiment of the present invention includes:
本体，所述本体包括至少一个本体单元，所述本体单元为V型的板状结构，所述本体设在烟道或反应器内以对流经的烟气脱硝除尘；a body comprising at least one body unit, the body unit being a V-shaped plate-like structure, the body being disposed in a flue or a reactor to denitrate and dedust the flue gas flowing through;
灰斗，所述灰斗设在所述烟道或反应器外且位于所述本体的下方以收集所述本体脱除的粉尘。A ash hopper is disposed outside the flue or reactor and below the body to collect dust removed by the body.
进一步地，所述本体由多个本体单元并排组成，所述本体单元包括：Further, the body is composed of a plurality of body units side by side, and the body unit includes:
折弯件，所述折弯件包括在对应的边缘处彼此紧密连接的两个实心矩形板，所述折弯件的横截面大致形成V字形；a bending member comprising two solid rectangular plates closely connected to each other at corresponding edges, the bent portion having a substantially V-shaped cross section;
两个复合件，每个所述复合件大致形成为多孔结构的矩形板，每个复合件在折弯件的一个对应的矩形板所在的平面中从与被紧密连接的边缘相对的边缘沿远离紧密连接的边缘的方向延伸，并且每个复合件用于对烟气进行脱硝除 尘。Two composite members, each of which is formed substantially as a rectangular plate of a porous structure, each composite member being away from an edge opposite the edge to which it is attached, in a plane in which a corresponding rectangular plate of the bent member is located The edges of the tight joints extend in the direction and each composite is used to denitrify and dedust the flue gas.
进一步地，所述折弯件由玻璃钢、碳钢或不锈钢制成。Further, the bending member is made of FRP, carbon steel or stainless steel.
进一步地，所述复合件为多孔结构，且所述折弯件的压损系数大于所述复合件的压损系数。Further, the composite member has a porous structure, and the compression loss coefficient of the bending member is greater than the pressure loss coefficient of the composite member.
进一步地，所述复合件包括：Further, the composite member includes:
第一层片，所述第一层片具有多孔通道结构并且由用于进行脱硝反应的催化剂制成；a first ply having a porous channel structure and made of a catalyst for performing a denitration reaction;
第二层片，所述第二层片具有多孔结构并且由陶瓷材料或其它耐磨损材料制成，所述第二层片贴设在所述第一层片上。A second ply having a porous structure and made of a ceramic material or other wear resistant material, the second ply being attached to the first ply.
进一步地，所述第一层片由具有脱硝作用的催化剂材料形成。Further, the first ply is formed of a catalyst material having denitration.
进一步地，所述第二层片由刚玉、莫来石、堇青石、硅酸铝纤维、碳化硅中的一种或多种混合制作而成。Further, the second layer is made of one or more of corundum, mullite, cordierite, aluminum silicate fiber, and silicon carbide.
进一步地，所述的高温脱硝除尘一体化装备还包括：反吹扫系统，所述反吹扫系统设在所述烟道或反应器内的朝向所述第一层片一侧。Further, the high-temperature denitration and dust removal integrated device further includes: a reverse purge system disposed on a side of the flue or reactor facing the first ply.
进一步地，每个所述折弯件的两个矩形板之间的夹角为15°以上且小于180°。Further, an angle between two rectangular plates of each of the bending members is 15° or more and less than 180°.
进一步地，所述本体在所述烟道的烟气流动方向上形成为一层或多层。Further, the body is formed in one or more layers in the flow direction of the flue gas of the flue.
进一步地，每层所述本体的数目根据烟道或反应器大小而设定，一般包括四个或以上相互连接且并列分布的所述本体单元。Further, the number of said bodies per layer is set according to the size of the flue or reactor, and generally includes four or more said unit units which are connected to each other and juxtaposed.
进一步地，所述灰斗形成为锥形。Further, the ash hopper is formed in a tapered shape.
本发明的上述技术方案的有益效果如下：The beneficial effects of the above technical solution of the present invention are as follows:
根据本发明实施例的高温脱硝除尘一体化装备，通过将V型板状本体设在烟道或者反应器内以脱除烟道或反应器内的粉尘，并在本体的下方设有收集粉尘的灰斗，通过对现有装置的优化和改进，降低运行成本，该高温脱销除尘一体化设备压损小，对烟气流动影响小，能够在高温下有效脱除飞灰和烟气中的氮氧化物,从而可以降低SCR系统中飞灰对催化剂和后续设备的磨损和堵塞，提高SCR脱硝系统的总体脱硝除尘效率。According to the high-temperature denitration and dust removal integrated device of the embodiment of the present invention, the V-shaped plate-shaped body is disposed in the flue or the reactor to remove the dust in the flue or the reactor, and the dust is collected under the body. The ash bucket reduces the running cost by optimizing and improving the existing device. The high-temperature off-load and dust-removing integrated device has small pressure loss and small influence on the flow of the flue gas, and can effectively remove nitrogen in the fly ash and the flue gas at high temperature. Oxide, which can reduce the wear and clogging of the fly ash in the SCR system on the catalyst and subsequent equipment, and improve the overall denitration and dust removal efficiency of the SCR denitration system.
附图说明DRAWINGS
图1为根据本发明实施例中高温脱硝除尘一体化装备的结构示意图；1 is a schematic structural view of an integrated equipment for high-temperature denitration and dust removal according to an embodiment of the present invention;
图2为根据本发明实施例中高温脱硝除尘一体化装备的本体的结构示意图。2 is a schematic structural view of a body of an integrated equipment for high-temperature denitration and dust removal according to an embodiment of the present invention.
附图标记：Reference mark:
高温脱硝除尘一体化装备100；High temperature denitration and dust removal integrated equipment 100;
本体10；本体单元11；折弯件12；复合件13；第一层片14；第二层片15；灰斗20。The body 10; the body unit 11; the bending member 12; the composite member 13; the first layer sheet 14; the second layer sheet 15;
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例的附图，对本发明实施例的技术方案进行清楚、完整地描述。显然，所描述的实施例是本发明的一部分实施例，而不是全部的实施例。基于所描述的本发明的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本发明保护的范围。The technical solutions of the embodiments of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is apparent that the described embodiments are part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the invention are within the scope of the invention.
下面结合附图具体描述根据本发明实施例的高温脱硝除尘一体化装备100。The high-temperature denitration and dust removal integrated device 100 according to an embodiment of the present invention will be specifically described below with reference to the accompanying drawings.
如图1所示，根据本发明实施例的高温脱硝除尘一体化装备100包括本体10和灰斗20。As shown in FIG. 1, a high temperature denitration and dust removal integrated apparatus 100 according to an embodiment of the present invention includes a body 10 and a hopper 20.
具体而言，本体10包括至少一个本体单元，所述本体单元为V型的板状结构，本体10设在烟道或反应器内以对流经的烟气脱硝除尘，灰斗20设在烟道或反应器外且位于本体10的下方以收集本体10脱除的粉尘。Specifically, the body 10 includes at least one body unit, the body unit is a V-shaped plate-like structure, and the body 10 is disposed in a flue or a reactor to denitrify and remove dust flowing through the flue gas, and the ash hopper 20 is disposed in the flue. Or outside the reactor and below the body 10 to collect the dust removed by the body 10.
换言之，高温脱硝除尘一体化装备100主要由本体10和灰斗20组成，其中，本体10包括至少一个本体单元，所述本体单元为V型的板状，本体10设在烟气流经的通道中，也就是说本体10可以布置在烟道或者反应器内，通道内烟气断面流速<15m/s，本体10下方且位于烟道或反应器的外侧设有灰斗20，灰斗20用于收集本体10脱除下来的粉尘。In other words, the high-temperature denitration and dust removal integrated device 100 is mainly composed of a body 10 and a hopper 20, wherein the body 10 includes at least one body unit, the body unit is a V-shaped plate, and the body 10 is disposed in a passage through which the smoke flows. Medium, that is to say, the body 10 can be arranged in the flue or the reactor, the flow velocity of the flue gas in the passage is <15 m/s, and the ash bucket 20 is provided below the body 10 and outside the flue or the reactor, and the hopper 20 is used. The dust removed from the body 10 is collected.
由此，根据本发明实施例的高温脱硝除尘一体化装备100，通过将V型的板状本体10设在烟道或者反应器内以脱除烟道或反应器内的粉尘，并在本体 10的下方设有收集粉尘的灰斗20，通过对现有装置的优化和改进，降低运行成本，该高温脱销除尘一体化设备100压损小，对烟气流动影响小，能够在高温下有效脱除飞灰，提高SCR系统的工作效率。Thus, the high-temperature denitration and dust removal integrated apparatus 100 according to the embodiment of the present invention removes the dust in the flue or the reactor by disposing the V-shaped plate-shaped body 10 in the flue or the reactor, and is in the body 10 The ash bucket 20 for collecting dust is provided below, and the operation cost is reduced by optimizing and improving the existing device. The high-temperature off-load dust-removing integrated device 100 has small pressure loss, has little influence on the flow of the flue gas, and can effectively take off at a high temperature. In addition to fly ash, improve the efficiency of the SCR system.
根据本发明的一个实施例，如图2所示，本体10由多个本体单元11并排组成，本体单元11包括折弯件12和两个复合件13。折弯件12包括在对应的边缘处彼此紧密连接的两个实心矩形板，折弯件12的横截面大致形成V字形，即两个矩形板之间形成一个夹角。这样的结构非常简单。每个复合件13大致形成为多孔矩形板，每个复合件13在折弯件12的一个对应的矩形板所在的平面中从与被紧密连接的边缘相对的边缘沿远离紧密连接的边缘的方向延伸。也就是说，每个复合件13和折弯件12的相应一个矩形板大致共面。复合件13用于对烟气进行脱硝除尘，所设本体单元11的个数与烟道或反应器的宽度有关。According to an embodiment of the present invention, as shown in FIG. 2, the body 10 is composed of a plurality of body units 11 side by side, and the body unit 11 includes a bending member 12 and two composite members 13. The bending member 12 includes two solid rectangular plates that are closely connected to each other at the corresponding edges, and the cross-section of the bending member 12 is substantially V-shaped, that is, an angle is formed between the two rectangular plates. This structure is very simple. Each of the composite members 13 is formed substantially as a perforated rectangular plate, and each composite member 13 is in a plane in which a corresponding rectangular plate of the bent member 12 is located from an edge opposite to the edge to be tightly joined, away from the edge of the tight connection. extend. That is, each composite member 13 and a corresponding one of the rectangular members 12 are substantially coplanar. The composite member 13 is used for denitration and dust removal of the flue gas, and the number of the unit units 11 is set to be related to the width of the flue or the reactor.
根据本发明的又一个实施例，折弯件12由玻璃钢、碳钢或不锈钢制成，折弯件可以为这些材料制成的平板层。According to still another embodiment of the present invention, the bending member 12 is made of FRP, carbon steel or stainless steel, and the bending member may be a flat layer made of these materials.
优选地，复合件13为多孔结构，且折弯件12的压损系数大于复合件13的压损系数。Preferably, the composite member 13 is of a porous structure, and the pressure loss coefficient of the bending member 12 is greater than the pressure loss coefficient of the composite member 13.
根据本发明的一些具体实施例，如图2所示，复合件13为复合结构，并且包括第一层片14和第二层片15。第一层片14具有多孔通道结构并且由用于进行脱硝反应的催化剂制成。所述多孔通道结构为具有多个通道的多孔结构。第二层片15具有多孔结构并且由陶瓷材料制成，第二层片15贴设在第一层片14上。According to some embodiments of the present invention, as shown in FIG. 2, the composite member 13 is a composite structure and includes a first ply 14 and a second ply 15. The first ply 14 has a porous channel structure and is made of a catalyst for performing a denitration reaction. The porous channel structure is a porous structure having a plurality of channels. The second ply 15 has a porous structure and is made of a ceramic material, and the second ply 15 is attached to the first ply 14 .
可选地，第二层片15由刚玉、莫来石、堇青石、硅酸铝纤维、碳化硅中的一种或多种混合制作而成。Alternatively, the second ply 15 is made of one or more of corundum, mullite, cordierite, aluminum silicate fiber, and silicon carbide.
根据本发明的一个实施例，第一层片14由Vi 2O 5-TiO 2/WO 3材料形成，并与烟气中氮氧化物进行脱硝反应，从而实现脱硝功能。第二层片15的多孔陶瓷结构用于脱除烟气中的飞灰，从而实现了对高温烟气同时脱硝除尘的目的，降低对SCR系统中催化剂和后续设备的堵塞和磨损，同时提高了SCR系统整体的脱硝效率。 According to an embodiment of the present invention, the first ply 14 is formed of a Vi 2 O 5 —TiO 2 /WO 3 material and subjected to denitration reaction with nitrogen oxides in the flue gas to achieve a denitration function. The porous ceramic structure of the second layer 15 is used for removing fly ash in the flue gas, thereby achieving the purpose of simultaneous denitration and dust removal of high temperature flue gas, reducing clogging and wear of the catalyst and subsequent equipment in the SCR system, and improving The overall denitration efficiency of the SCR system.
进一步地，高温脱硝除尘一体化装备100还包括反吹扫系统，反吹扫系统 设在烟道或反应器内且朝向第一层片14一侧，反吹扫系统可以为蒸汽或声波吹扫系统，反吹扫系统根据烟道或者反应器内的灰分含量及其结构进行确定。Further, the high-temperature denitration and dust removal integrated device 100 further includes a reverse purge system, the reverse purge system is disposed in the flue or reactor and faces the first layer 14 side, and the back purge system can be steam or sonic purge The system, backflush system is determined based on the ash content of the flue or reactor and its structure.
在本发明的一个实施例中，每个折弯件12的两个矩形板之间的夹角大于15°且小于180°。In one embodiment of the invention, the angle between the two rectangular plates of each bend member 12 is greater than 15° and less than 180°.
可选地，根据工艺需求，可在烟道的烟气流动方向上布置一层或多层本体10。Alternatively, one or more of the bodies 10 may be arranged in the direction of flow of the flue gas in the flue, depending on the process requirements.
根据本发明的一个实施例，每层本体10中一般包括四个相互连接且并列分布的本体单元11，具体数目根据烟道或反应器宽度确定。In accordance with an embodiment of the present invention, each of the layers 10 generally includes four body units 11 interconnected and juxtaposed, the number of which is determined by the width of the flue or reactor.
根据本发明的又一个实施例，灰斗20形成为锥形。According to still another embodiment of the present invention, the ash bucket 20 is formed in a tapered shape.
总而言之，根据本发明实施例的高温脱硝除尘一体化装备100，通过将具有V型的板状本体单元的本体10设在烟道或者反应器内以脱除烟道或反应器内的粉尘，并在本体10的下方设有收集粉尘的灰斗20，通过对现有装置的优化和改进，降低运行成本，该高温脱销除尘一体化设备100压损小，对烟气流动影响小，能够在高温下有效脱除飞灰和烟气中的氮氧化物,从而可以降低SCR系统中飞灰对催化剂和后续设备的磨损和堵塞,提高SCR脱硝系统的总体脱硝效率。In summary, the high-temperature denitration and dust removal integrated device 100 according to an embodiment of the present invention removes dust in a flue or reactor by disposing the body 10 having a V-shaped plate-shaped body unit in a flue or a reactor. A dust hopper 20 for collecting dust is disposed under the body 10, and the operating cost is reduced by optimizing and improving the existing device. The high-temperature off-load and dust-removing integrated device 100 has small pressure loss, small influence on the flow of the flue gas, and can be at a high temperature. Effectively remove nitrogen oxides from fly ash and flue gas, which can reduce the wear and blockage of fly ash in the SCR system on the catalyst and subsequent equipment, and improve the overall denitration efficiency of the SCR denitration system.
以上所述是本发明的优选实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明所述原理的前提下，还可以作出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. It should be considered as the scope of protection of the present invention.

Claims (12)

  1. 一种高温脱硝除尘一体化装备，其特征在于，包括：An integrated equipment for high-temperature denitration and dust removal, characterized in that it comprises:
    本体，所述本体包括至少一个本体单元，所述本体单元为V型的板状结构，所述本体设在烟道或反应器内以对流过的烟气进行脱硝除尘；a body comprising at least one body unit, the body unit is a V-shaped plate-like structure, and the body is disposed in a flue or a reactor to perform denitration and dust removal on the flowing flue gas;
    灰斗，所述灰斗设在所述烟道或反应器外且位于所述本体的下方以收集所述本体脱除的粉尘。A ash hopper is disposed outside the flue or reactor and below the body to collect dust removed by the body.
  2. 根据权利要求1所述的高温脱硝除尘一体化装备，其特征在于，所述本体由多个本体单元并排组成，所述本体单元包括：The high-temperature denitration and dust removal integrated device according to claim 1, wherein the body is composed of a plurality of body units side by side, and the body unit comprises:
    折弯件，所述折弯件包括在对应的边缘处彼此紧密连接的两个实心矩形板，所述折弯件的横截面大致形成V字形；a bending member comprising two solid rectangular plates closely connected to each other at corresponding edges, the bent portion having a substantially V-shaped cross section;
    两个复合件，每个所述复合件大致形成为矩形板，每个复合件在折弯件的一个对应的矩形板所在的平面中从与被紧密连接的边缘相对的边缘沿远离紧密连接的边缘的方向延伸，并且每个复合件用于对烟气进行脱硝除尘。Two composite members, each of which is formed substantially as a rectangular plate, each composite member being closely spaced from the edge opposite the edge to which it is attached, in a plane in which a corresponding rectangular plate of the bending member is located The direction of the edges extends and each composite is used to denitrify and dedust the flue gas.
  3. 根据权利要求2所述的高温脱硝除尘一体化装备，其特征在于，所述折弯件由玻璃钢、碳钢或不锈钢制成。The high-temperature denitration and dust removal integrated device according to claim 2, wherein the bent member is made of glass reinforced plastic, carbon steel or stainless steel.
  4. 根据权利要求2所述的高温脱硝除尘一体化装备，其特征在于，所述复合件为多孔结构，且所述折弯件的压损系数大于所述复合件的压损系数。The high-temperature denitration and dust removal integrated device according to claim 2, wherein the composite member has a porous structure, and a pressure loss coefficient of the bent member is greater than a pressure loss coefficient of the composite member.
  5. 根据权利要求2所述的高温脱硝除尘一体化装备，其特征在于，所述复合件包括：The high-temperature denitration and dust removal integrated device according to claim 2, wherein the composite member comprises:
    第一层片，所述第一层片具有多孔通道结构并且由用于进行脱硝反应的催化剂制成；a first ply having a porous channel structure and made of a catalyst for performing a denitration reaction;
    第二层片，所述第二层片具有多孔结构的耐磨材料制成，所述第二层片贴设在所述第一层片上。a second ply having a porous structure of a wear resistant material, the second ply being attached to the first ply.
  6. 根据权利要求5所述的高温脱硝除尘一体化装备，其特征在于，所述第一层片由具有脱硝作用的催化剂材料形成。The high-temperature denitration and dust removal integrated device according to claim 5, wherein the first ply is formed of a catalyst material having denitration.
  7. 根据权利要求5所述的高温脱硝除尘一体化装备，其特征在于，所述第二层片由刚玉、莫来石、堇青石、硅酸铝纤维、碳化硅中的一种或多种混合 制作而成。The high-temperature denitration and dust removal integrated device according to claim 5, wherein the second layer is made of one or more of corundum, mullite, cordierite, aluminum silicate fiber and silicon carbide. Made.
  8. 根据权利要求5所述的高温脱硝除尘一体化装备，其特征在于，还包括：The high-temperature denitration and dust removal integrated device according to claim 5, further comprising:
    反吹扫系统，所述反吹扫系统设在所述烟道或反应器内的朝向所述第一层片一侧。A back purge system is provided on the side of the flue or reactor facing the first ply.
  9. 根据权利要求2所述的高温脱硝除尘一体化装备，其特征在于，每个所述折弯件的两个矩形板之间的夹角为15°以上且小于180°。The high-temperature denitration and dust removal integrated device according to claim 2, wherein an angle between two rectangular plates of each of the bent members is 15° or more and less than 180°.
  10. 根据权利要求2所述的高温脱硝除尘一体化装备，其特征在于，所述本体在所述烟道的烟气流动方向上形成为一层或多层。The high-temperature denitration and dust removal integrated device according to claim 2, wherein the body is formed in one or more layers in a flow direction of the flue gas of the flue.
  11. 根据权利要求8所述的高温脱硝除尘一体化装备，其特征在于，每层所述本体的数目根据烟道或反应器大小而设定，一般包括四个或以上相互连接且并列分布的所述本体单元。The high-temperature denitration and dust removal integrated device according to claim 8, wherein the number of said bodies in each layer is set according to a flue or a reactor size, and generally includes four or more said mutually connected and juxtaposed said Body unit.
  12. 根据权利要求1所述的高温脱硝除尘一体化装备，其特征在于，所述灰斗形成为锥形。The high-temperature denitration and dust removal integrated device according to claim 1, wherein the ash hopper is formed in a tapered shape.
PCT/CN2018/120890 2017-12-25 2018-12-13 High-temperature integrated denitration and dust removing apparatus WO2019128727A1 (en)

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